strange matlab symbolic behavior?

I am using Matlab 2006a.
y is a symbolic object, which was obtained by:
z=vpa(zs, 10);
p=vpa(ps, 10);
y=1+p*z';
Here "zs" and "ps" are symbolic objects.
(I have to do vpa on "z" and "p" first, otherwise the whole thing is
extremely slow. Anyway, I only need 10 digits of precision)
Here is one element of "y":
>> y(300)
ans =
..95692000694506875870254246903886
Now here is the ERROR:
>> double(y(300))
ans =
0.00492224111378
>> vpa(y(300))
ans =
..492224111377750000222499982224e-2
What happened?
A 0.9569... value converted into "double" is "0.0049222..."???
If I don't convert "y" into double, I cannot plot it:
>> plot(y)
??? Error using ==> plot
Conversion to double from sym is not possible.
>> plot(vpa(y))
??? Error using ==> plot
Conversion to double from sym is not possible.
---------------------------------------
Is there a way to convert y into floating point but still maintains its
correct value: 0.9569200069450...???
>> y(300)
ans =
..95692000694506875870254246903886

MATLAB talking to MATLAB?For my project, I need to have a client program (MATLAB executable) talking
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I appreciate any help that I can get on that.
Thanks.
Cheers,
Hoi
Oops, I forgot to mention. There are multiple clients querying the server,
so I guess serial objects + remote serial port wouldn't work.
"Hoi Wong" <wonghoi.ee@gmail.com_> wrote in message
news:f3ald6$gg4$1@news.Stanford.EDU...
> For my project, I need to have a client program (MATLAB executable)
> talking to a ser...

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In article <p9qdncFk5e7VVlHanZ2dnUVZ_jWdnZ2d@comcast.com>,
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>What's the difference between Maple Toolbox for Matlab and Matlab Symbolic
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>I saw Maplesoft website selling the former, and Mathworks selling the
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On Aug 27, 6:54=A0am, ettevy <han.wang1...@gmail.com> wrote:
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syms x
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it doesn't works :(
help please.
On 1/17/2012 3:46 AM, imen wrote:
> hello,
> i want to put a condition on symbolic object but i can't do it for example:
> syms x
> if x<0
> f=x^2
> else f=0
> end;
> it doesn't works :(
> help please.
It might help to assign an actual value to the symbol x before
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--Nasser
"...

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sina.tootoonian wrote:
>
>
> Hello everyone,
>
> How do I compile MATLAB M files into a form that can then be called
> from within the MATLAB interpreter? A round...

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jairo serrano wrote:
>
>
> How to send vars from Delphi to Matlab ? and viceverse, from matlab
> to delphi ? thanks, it is dificult, and not found answers in the
> internet.
When I want to use Matlab variables in another program, I write them
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Hope this helps,
Niels
jairo serrano wrote:
> How to send vars from Delphi to...

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alex wrote:
>Hi
>
>I know how to type alpha in the matlab figure like \alpha. How about
>infinity? \infinity and \inf do not work. Thanks for any sugguestion.
>
>
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S.
--
e-mail : Stephane.Mottelet@nospam.gnark.gnark
alex wrote:
>
>
> Hi
>
> I know how to type alpha in the matlab figure like \alpha. How
> about
> infinity? \infinity and \inf do not work. Thanks for any
> sug...

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hani_al_yazidi@hotmail.com wrote:
> any one please can help me sploving the following question
>
>
> 1________Given the causal system
>
> y[n] = 0.9y[n-1] + x[n],
>
> find H(z) and sketch...